Common problems guide

The most common Ferroli Arena 30 C problems

The faults most likely to send a Ferroli Arena 30 C into lockout — with plain-English causes, what to check first, estimated repair costs and whether you need a Gas Safe engineer.

This model is discontinued. Parts can be harder to source and expensive. If repair costs are mounting, a new A-rated boiler may be the smarter choice.
18 documented codes
6 most common
2 DIY-safe checks
4 engineer needed

The 6 most common faults

01
Insufficient water system pressure High DIY-safe

Your boiler has stopped working because the water pressure inside the system has dropped too low.

What to try first

Locate the filling loop underneath the boiler.Open the valves gently to let water into the system until the pressure gauge reads between 1.0 and 1.5 bar.Close both valves tightly and reset the boiler.

Parts
Filling loop, Pressure relief valve, Expansion vessel
Full guide for Insufficient water system pressure
02
A High DIY-safe

Your boiler has completely stopped working as a safety precaution and needs you to press the reset button to try and restart it.

What to try first

Locate the reset button, usually marked with the letter 'R' on your boiler's control panel.Press and hold the 'R' button for about 2 to 3 seconds.Wait to see if the boiler fires up and the fault code clears; if it immediately locks out again, do not keep resetting it.

Full guide for A
04
Safety thermostat activation High Engineer

Your boiler has detected that it is dangerously overheating because the water is failing to flow through the system as it should.

Est. cost
£150-300
Parts
Central heating pump, System filter, Heat exchanger
Full guide for Safety thermostat activation
06
Fan fault High Engineer

Your boiler has stopped working because the mechanical component responsible for circulating air and exhausting combustion gases is not receiving power or has failed.

Est. cost
£200-350
Parts
Combustion fan, Fan wiring harness
Full guide for Fan fault
Parts most often replaced

on the Ferroli Arena 30 C

Filling loopPressure relief valveExpansion vesselIgnition electrodeGas valvePCB

Based on parts cited in our fault code database. Your engineer will confirm what's actually needed after diagnosis.

Call a Gas Safe engineer if…

  • You can smell gas or see signs of a leak
  • The Ferroli shows an Emergency or High severity code
  • The boiler keeps locking out after repeated resets
  • You've tried the DIY checks and the fault hasn't cleared
  • There's visible water leaking from the boiler
  • The flame is yellow or orange instead of blue
See the full 18-code list for the Ferroli Arena 30 C

Related guides

Boiler losing pressure → No hot water → When to replace → Symptom checker →